Add external dependency LibFFmpeg#573

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ChristianFeldmann wants to merge 7 commits intodevelopfrom

switchToSubmoduleLibFFmpeg

Commits on May 4, 2024

Update libffmpeg
ChristianFeldmann
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Commits on Jun 1, 2024

Work on creating a new data source structure
ChristianFeldmann
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Commits on Oct 6, 2024

Merge branch 'develop' into switchToSubmoduleLibFFmpeg
ChristianFeldmann
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